Warm air heater



Jan. 10, 1933. D. R. RICHARDSON ET AL 1,394,122

WARM AIR HEATER Filed June 6, 1928 3 Sheets-Sheet l fiic Z INVENTOR- )h I 4- I d v am 2 A TTORNEYS.

1933- D. R. RICHARDSON ET AL 2 WARM AIR HEATER Filed June 6, 1928 3 Sheets-Sheet 2 H P- 15 1 E E [06 Q1 mi 20 1 1 9 0 [E 0 \E 15 15 f 11 51 21 1 7 16 5'6 f] [F 96 35 E1 q. E1.

M,- W 7 L 4 I y 2 ATTORNEYS? 1933- DR. RICHARDSON ET AL 1,394,122

WARM AIR HEATER Filed June 6, 1928 3 Sheets-Sheet 3 INVENTOR. M 04) Wm WM 777v, W4 Mm ATTORNEYS.

Patented Jan. 10, 1933 UNlTED STATES PATENT FFlCE DAVID BAIT RICHARDSON, OF NEW YORK, N. Y., AND ANDREW RUSSELL LYND, 0J3 DOVER, N EW' JERSEY, ASSIGNORS TO RICHARDSON & BOYNTON COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK WARM Am HEATER Application filed June 6, 1928. Serial No. 283,207.

This invention relates to warm air heaters, and, more particularly, to that type of warm air heater in which a heating unit is surrounded by a casing into which cold air which is delivered to the bottom and externally of the heating unit is heated by passing upwardly around the unit and is collected and released or distributed at a bonnet at the top of the casing.

It is an object of the invention to provide a device of this character the parts of which will be relatively few in number, rugged in construction and capable of being assembled readily to provide a warm air heater that will render efiicient service over long periods of time, and which may be produced and in stalled at a relatively low cost.

Among the other objects of the invention is the provision of a warm air heater structure of a type which has a high heating efficiency, which is simple of construction, and which has an attractive appearance, and which at the same time fulfills the installation and operation condition. for a particularly satisfactory heater, either of the multiple pipe type or of the pipeless type.

Other objects of the invention will in part be obvious and will in part appear hereinafter.

lhe invention accordingly comprises the features of construction, combination of elements and arrangement of parts which will be exemplified in the construction hereinafter set forth, and the scope of the application of which will be indicated in the claims.

For a fuller understanding of the nature and objects of the invention reference should be had to the following detailed description taken in connection with the accompanying drawings, in which:

Figure 1 is a front elevational view showing one embodiment of the invention;

Fig. 2 is a side elevational view thereof, showing the bonnet and the casing unit surrounding the heating unitpartlybroken away Fig. 3 is a horizontal sectional View taken along the line 3-3 of Fig. 1 and looking in the direction of the arrows of Fig. 1;

Fig. 4 is a perspective detail view of the base-rail and bottom pieces on which is placed the heating unit and surrounding casings;

F 1g. 5 is a partly sectional view similar to Fig. 2, illustrating in detail one type of air intake and air outlet means adapted for use in accordance with the invention;

Fig. 6 is a similar view illustrating a diflerent type of air outlet means;

Fig. 7 is a similar view of a heater equipped with a diflerent type of air inlet;

Fig. 8 is a top view of the form of heater shown in Fig. 7;

Fig. 9 is a View similar to Fig. 3, showing a modified form of the internal heater casing;

Fig. 10 is a detail side elevational view, partly broken away, showing another type of bonnet construction;

Fig. 11 is a detail view similar to Fig. 9 showing the heater exemplified in Fig. 9 equipped with air-intake pipes; and

Fig. 12 is a fragmentary detail view of a heater structure with the heating unit removed and showing the structure of a base type intake.

In these views the numeral 10 designates generally the heating unit which may be of any suitable type and is here shown constructed in the usual manner with an ashpit 10a, firebox 10b, and radiator 100. The heating unit is also shown provided with a smokepipe 11 and filling and cleaning openings 12, the latter of which projects through a front plate 13.

When installing the heater it is preferably disposed with the ashpit resting upon a similarly outlined base-bottom 14, disposed around which is a base-rail 15 having an upstanding lip 16, radially-disposed braces 1 and upstanding supports 18 having a plurality of offset fingers 19 at their tops; all for purposes hereinafter pointed out.

In the embodiments shown in Figs. 1 to 8, an inside casing 20 is disposed around the heatingunit, its top being substantially flush with the top and its bottom terminating short of the bottom thereof and resting upon and gripped by the fingers 19 of the upright supports 18. As shown in Fig. 3, the casing 2-0 is largely concentric with the heating unit, except in the front thereof it follows generally the outlines of the feeding and cleaning openings projecting into the front plate 13, and the ends thereof are preferably connected to the front plate by means of suitable bolts as will be readily understood.

Around the base-rail 15 and its upstanding flange 16 is fitted an external casing 21, which extends from the base-rail up to and substantially flush with the top of the heating unit and the interior casing 20. The casing 21, as will be readily understood, may be formed from a plurality of sheet metal plates secured to the front plate 13 of the heating unit and to the base-rail and flange l5 and 16 respectively by bolts or the like; said plates being also connected at the corners in any desired manner. A particularly desirable manner of connecting the adjacent plates at their ed es is shown, however, in Fig. 3, in which t e vertical edges of the plates are bent over so that they will overlap slightly, and a corner pilaster is held on the corner by bolts which pass therethrough and through the overlapping vertical edges of the casing plates. 7

There is thus provided a casing which is particularly neat in appearance and rigid in construction. In the embodiment illustrated the casing is shown as being square, but it is obvious that it may be of any desired configuration. It is also to be understood that, if desired, any of the casings aforesaid may be further subdivided or otherwise attached without departing from the spirit of the invention.

In the embodiment shown in Figs. 1 to 5, inclusive, there is superposed upon the structure heretofore described a bonnet 22, which comprises a flattened portion 23, an upstanding portion 24, and a dome 25. The flat portion 23 seals the space between the internal and external casings whereby a dead-air space is provided around the internal casing, which space serves to provide an effective in- Sulation between the outer air and interior passageway through which warm air passes upwardly around the heating unit and into the dome 25. In this case the heater is suitably provided adjacent its base with an air inlet comprising an apertured plate 30 and a short duct member 31 which discharges the delivered air interiorly of the casing 20. Suitable means, such as the large diameter conduit (Fig. 5) may be provided where it is desired to connect the central opening in the bonnet with an opening in the floor above the heater.

In Fig. 6 there is shown a similar heater equipped with a bonnet 22a having a flat portion 23a similar to the portion 23 of the honnet22 and having a dome-shaped portion 250. At the top of this bonnet there is provided a concave top plate 26, which may be removed from the bonnet in case it isdesired to conduct the warm air upwardly through the central opening of the bonnet, but which ordi narily fills this opening and facilitates the distribution of warm air through suitable laterally extending leaders, such as shown at 36. The plate 26 can be utilized to good advantage as an insulating means simply by fillin the concaved portion thereof with sand or other insulating material.

In both of the heaters heretofore described the outwardly extending fiat portion (23 or 23a) of the bonnet completely closes the top of the space between the casings 20 and 21, thus providing a dead-air space which acts as an insulating medium so as to prevent loss of heat during the operation of the heater. Due to the fact that the inner casin 20 terminates short of the bottom of the eater, providing ready communication between this insulating space and the air passagewa inside the casing 20, there is ordlnarig no great difference in the condition of the air in the insulating space and the air in the passageway. There is, however, no communication between these chambers at any point adjacent or above the fire-box by which ready transfer of cold air from the insulating space to the delivery system might occur.

F igs, 7 and 8 show a form of heater wherein the base air intake is omitted and which is equipped with a bonnet 22?) having a fiattened portion 23b in which openings have been formed to receive air inlet pipes 37. While the form of heater particularly exemplified in Figs. 7 and8 includes a plate 26 and leaders 36, it is to be understood that, if desired, inlet pipes, such as 37, may be employed in connection with a single outlet heater, as well as with a multiple type heater. It is to articularly noted that the construction of t e bonnet provides ample room for the connection of inlet pipes, which may be employed to withdraw cold air for the rooms of a house, with the flat portion 23!) thereof.

Fig. 10 illustrates a heater structure having another form of bonnet. This form of bonnet, shown at 220, is similar to that just described, although the domeortion 27 thereof begins substantially fiusi with the edges. There is therefore provided a flat plate 28 at the bottom which seals the space between the two casings and which has an opening 29 in its central portion communicating with the dome 27 and through which the warmed air passes from the heating unit. The structure is adapted for use as a heater similar to those exemplified in Figs. 5, 6 and 7 by the provision of a suitable intake in its base or at its upper end, and by the removal of the plate 26 or by the provision of. a plurality of outlet pipes, such as the pipes 36, for example, as the case may be.

In Fig. 9 there is shown a modified form of warm air casing in that the inner casing 20 is replaced by corner plates 32, which are of substantially the same vertical length as the casing 20 and are attached to the side members by suitable bolts. These plates have a dual function of strengthening the outer casing and forming partial inner casings about the air heating chamber 34 around the heating unit. By the use of these plates, a space 33 is provided at the corners of the outer casing which, when a base intake is provided, serves as a dead-air space to insulate these portions of the outer casing. 11 shows a form of heater similar to that illustrated in Fig. 9, except that inlet pipes 37 are provided at the corners of the outwardly extending portion 23 of the bonnet.

Since certain changes may be made in the above construction, and different embodiments of the invention could be made, without departing from the scope thereof, it is intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.

It is also to be understood that the following claims are intended to cover all of the generic and specific features of the invention herein described, and all statements of the scope of the invention which as a matter of language might be said to fall therebetween.

Having described our invention, what we claim as new and desire to secure by Letters Patent is:

1. In a device of the class described, a bottom plate formed to receive the base of a heating unit, a bottom rail surrounding said plate and formed to receive a casing surrounding said unit, and means comprising portions extending inwardly from said rail and adapted to support a second casing spaced interiorly therefrom and exteriorly of the heating unit.

2. In a device of the class described, a bottom plate formed to receive the base of a heating unit, a bottom rail surrounding said plate and formed to receive a casingsurrounding said unit, and means compris ng portions extending inwardly from said rail and adapted to support a second casing spaced interiorly therefrom and exteriorly of the heating unit; said supports being disposed at a level higher than that of the base-receiving plate and the bottom rail.

3. In a device of the class described, a bottom plate formed to receive the base of a heating unit, a bottom rail surrounding said plate and formed to receive a casing surrounding said unit, spacing members between said rail and said base-receiving plate, upstanding supporti.ng-rnembers disposed on said spacing means and intermediately of the Y length thereof, said supporting-members being adapted to support a second casing interiorly of and spaced from said first-mentioned casing and exteriorly of and spaced from said heating unit.

l. In a device of the class described, a bottom plate formed to receive the base of a heating unit, a bottom rail surrounding said plate and formed to receive a casing surrounding said unit, spacing members between said rail and said base-receiving plate, upstanding supporting-members disposed on said spacing means and interniediately of the length thereof; said supporting-members havin upwardly-extending fingers adapted to receive the lower edge of a second casing and being disposed intermediately of said spacing members whereby said second casing is held interiorly of and spaced from said heating unit.

5. A. warm air heater structure, comprising, in combination, a substantially rectangular outer casing, a bonnet at the top of the heater, and means including a portion of said bonnet and providing a dead-air space within at least certain portions of the outer casing.

6. A warm air heater, comprising, in combination, a heating unit, an inner casing surrounding said heating unit and terminating short of the bottom of the heater, an outer casing, and a bonnet at the top of said heater. having a portion enciosing the top of the space between said inner casing and said outer casing to form a dead-air space therein.

7. A warm air heater, comprising, in combination, a heating unit, an inner casing surrounding said heating unit and terminating short of the bottom of the heater, an outer casing, and a bonnet at the top of said heater having a portion meeting said inner casing and adapted to receive warm air therefrom, and a portion extending outwardly from the inner casing and closing the top of the space between the inner casing and the outer casing to form a dead-air space therein.

8. A warm air heater, comprising, in combination, a heating unit, a bottom plate formed to provide the base of said heating unit, a bottom rail surrounding said plate, an outer casing supported on said rail, spacmembers between said rail and said base plate, a plurality of upwardly extending supports carried by said spacing members, an inner casing carried on said upwardly extending supports, and a bonnetat the top of said heater having a portion adapted to receive warm air from the space between said inner casing and said heating unit, and a portion extending outwardly over the space between said inner casing and said outer casing.

9. A warm air heater, comprising, in combination, a heating unit, an inner casing surrounding said heating unit and terminating short of the bottom of the heater, an outer casing, a bonnet at the top of said heater hav ing a portion enclosing the top of the space between said inner casin and said outer casing to form a dead-air space therein, and means comprising an air inlet conduit extending from a point outside the outer casing to a point beneath the space inside the inner casing for admitting air to be heated Within the inner casing.

10. A warm air heater structure comprising, in combination, an outer casing, a bonnet at the top of the heater, means including a portion of said bonnet and providing a deadair space within at least certain portions of the casing and means comprising an air inlet conduit extending from a point outside the casing toa point, nearer the heater than and beneath said space for admitting air to be heated adjacent said heater.

In testimony whereof we aflix our signatures.

ANDREW RUSSELL LYND. DAVID RAIT RICHARDSON. 

